package com.glela.common.util;

import java.security.DigestException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class Sha1 {

	/** 
     * SHA1 安全加密算法 
     * @param maps 参数key-value map集合 
     * @return 
     * @throws DigestException  
     */  
    public static String SHA1(String decrypt) throws DigestException {  
        //获取信息摘要 - 参数字典排序后字符串  
        //String decrypt = getOrderByLexicographic(maps);  
        try {  
            //指定sha1算法  
            MessageDigest digest = MessageDigest.getInstance("SHA-1");  
            digest.update(decrypt.getBytes());  
            //获取字节数组  
            byte messageDigest[] = digest.digest();  
            // Create Hex String  
            StringBuffer hexString = new StringBuffer();  
            // 字节数组转换为 十六进制 数  
            for (int i = 0; i < messageDigest.length; i++) {  
                String shaHex = Integer.toHexString(messageDigest[i] & 0xFF);  
                if (shaHex.length() < 2) {  
                    hexString.append(0);  
                }  
                hexString.append(shaHex);  
            }  
            return hexString.toString().toUpperCase();  
  
        } catch (NoSuchAlgorithmException e) {  
            e.printStackTrace();  
            throw new DigestException("签名错误！");  
        }  
    } 
    


}
